Large-aperture quasi-telephoto lens system

Details Large-aperture quasi-telephoto lens system Large-aperture quasi-telephoto lens system

1989-05-04

1991-07-09

Sugarman, Scott J.

350413, G02B 1302, G02B 962, G02B 964

Patent

active

050299948

ABSTRACT:
A large-aperture quasi-telephone lens system having favorably corrected aberrations, especially chromatic aberration, and providing images of high quality comprising, in the order from the object side, a front lens group, a stop and a rear lens group, said rear lens group consisting of a lens component having negative refractive power and a lens group having positive refractive power, and comprising at least one graded refractive index lens element.

REFERENCES:
patent: 4840467 (1984-06-01), Takada et al.
patent: 4842386 (1989-06-01), Kiragishi et al.

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